The period of \[{{\sin }^{4}}x+{{\cos }^{4}}x\]is [RPET 1997]

1.	The period of \[{{\sin }^{4}}x+{{\cos }^{4}}x\]is [RPET 1997]
A.	\[\pi /2\]
B.	\[\pi \]
C.	\[2\pi \]
D.	\[3\pi /2\]
Answer» B. \[\pi \]

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The period of \[{{\sin }^{4}}x+{{\cos }^{4}}x\]is [RPET 1997]

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